Mysterious 'donut' structure is discovered hidden inside Earth's core - and it could unlock the secrets of our planet's protective magnetic field ...

The inner structure of Mars, revealed: NASA discovers a molten layer wrapped around the planet's core - in breakthrough that could provide key clues to its formation ...

An ancient structure surrounds Earth’s core, study claims. By Joshua Hawkins. Published Apr 11th, 2023 9:01PM EDT. Image: rost9 / Adobe.

Scientists Found Signs of a Hidden Structure Inside Earth's Core. Tessa Koumoundouros. Sat, January 11, 2025 at 10:19 PM UTC. 3 min read. Earths Innermos tInner Core.

This donut-like structure runs parallel to the equator in a ring around the edge of the liquid outer core, and could be responsible for driving our planet's protective magnetic field.